Yeah that's true for sure, but don't you need to be rooted anyways to use a PS3 controller? From my experience, PS3 support is pretty crap on Android devices. Probably doesn't matter since Android's have the MOGA controller to use anyways. Watching that Google Game API to be officially used, achievements and finally save files.
Root is nothing special and nothing like jail breaking an iPhone.all rooting does is allows full access to the root of the file system.it took 5 seconds to root my gs4 and it is the same exact phone with nothing changed with just root access.
Running a custom ROM is like a jail broken iPhone and the way Google is pushing it is for one standard keypad layout so everyone can follow so a few months later you can still use the same game pad on all the new games